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What original emission equipment came on this truck

1979 Ford F350 4x4, 8550 gvw Whatoriginal components where on this truck? Thanks
Answer:

Your 1979 Ford came equipped from the factory with the following emission components. PCV - Positive Crank Ventilation System. It's a small valve located on top of valve cover. Might be on either engine side. A hose connects this valve to the intake manifold. ACL - The is the silver tube that leads from the carb to the exhaust manifold heat shield. AIS - Thermactor system; pump type. EGR - Exhaust gas recirculation valve. EVAP - Also known as Charcoal Canister. posted by SmogTips Support

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